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3. AUDIO AMPLIFIER STAGES
A. MAIN AMPLIFIER (TAS5719)(6-8 W option)
a. General Description
The TAS5717/TAS5719 is a 10-W/15-W, efficient,digital audio-power amplifier for
driving stereo bridge-tied speakers. One serial data input allows processing of up to two
discrete audio channels and seamless integration to most digital audio processors and MPEG
decoders. The device accepts a wide of input data and data rates. A fully programmable data
path routes these channels to the internal speaker drivers.
The TAS5717/9 is a slave-only device receiving all clocks from external sources. The
TAS5717/TAS5719 operates with a PWM carrier between a 384-kHz switching rate and a
352-KHz switching rate, depending on the input sample rate. Oversampling combined with a
fourth-order noise shaper provides a flat noise floor and excellent dynamic range from 20 Hz
to 20 kHz.
b. Features
• Audio Input/Output
– TAS5717 Supports 2×10 W and TAS5719 Supports 2×15 W Output
– Wide PVDD Range, From 4.5 V to 26 V
– Efficient Class-D Operation Eliminates Need for Heatsinks
– Requires Only 3.3 V and PVDD
– One Serial Audio Input (Two Audio Channels)
– I2C Address Selection via PIN (Chip Select)
– Supports 8-kHz to 48-kHz Sample Rate (LJ/RJ/I2S)
– External Headphone-Amplifier Shutdown Signal
– Integrated CAP-Free Headphone Amplifier
– Stereo Headphone (Stereo 2-V RMS Line Driver) Outputs
• Audio/PWM Processing
– Independent Channel Volume Controls With 24-dB to Mute
– Programmable Two-Band Dynamic Range Control
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